S4Per

<center><img src="http://pictureposter.audiworld.com/37814/boost.jpg"></center><p>Hi All,
Not a full 3rd gear run but perhaps enough to get some opinions (will be doing more logging in the coming week).

Two things: I'm investigating why I'm not peaking/hodling even requested as high as it used to be - - this has been the case ever since I received updated GIAC file.

But mainly for this post: I'm curious about my actual - - it's not dying off, but holding steady 2.5-3psi below requested. Seems like it should be a lot closer to requested? Would that still sound like a boost leak if it's not continuing to drop and drop as rpms and requested go up/stay constant?

TIA,
Per

The_Jerbel (Jordan)

Either a boost leak or a bad N75 valve. Most likely a leak though.

ModifiedA4

long term fuel trims should be checked. block 032.

SCSI

trying to compensate for the loss of pressure and if it's the case, you have a huge boost leak somewhere.

I can borrow you all the necesary pressure testing stuff. Let me know.

S4Per

thank you sir ;-) ygm.

S4Per

..just a more common scenario?

The_Jerbel (Jordan)

Yep, and a bad N75 usually has a more sporratic curve than that.

Santorin_OX

<center><img src="http://pictureposter.audiworld.com/92770/boostcurve-82f.jpg"></center><p>It's stock but the actual and requested are pretty much dead on.

S4Per

great. thanks! hopefully i'll track this down asap

Andrew C.

<img src="http://i26.photobucket.com/albums/c125/drewski11/N75%20Difference/image002.gif">